One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,5)(6,8)(9,10)(11,14)(12,22)(13,18)(15,20)(16,19)(17,24)(21,23) involution — undirected(2,5)(6,7)(9,11,14,10,16,20,15,19)(12,22,13,21,24,17,23,18)(1,3,4,8)(2,6,5,7)(9,12,16,24)(10,17,19,22)(11,21,20,18)(13,15,23,14)(9,13)(10,18)(11,17)(12,15)(14,24)(16,23)(19,21)(20,22) involution — undirected(9,14,16,15)(10,11,19,20)(12,13,24,23)(17,21,22,18)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.